KISSIMMEE, Fla. (February 11, 2013)--A new era starts this week for the Houston Astros, who will be playing under a new manager, in a new league and even in new blue and orange uniforms.

Manager Bo Porter led several pitchers and catchers through an informal workout Monday in Kissimmee, Fla., a day before the Astros' first organized spring training workout as members of the American League.

He said the Astros can use a new attitude and a new level of expectations after back-to-back seasons with more than 100 losses, worst in franchise history.

The Astros have brought in several new pitchers, including Philip Humber, Alex White, Eric Bedard and John Ely, to compete for two spots in their rotation and virtually every spot in their bullpen.